How to Fix B1404 Driver Power Window Down Circuit Open

Introduction

If you’re experiencing the B1404 error code on your car, it means that the driver power window down circuit is open. This can be a frustrating problem to deal with, especially if you rely on your car’s power windows to function properly. Fortunately, there are some steps you can take to fix this issue on your own. In this article, we’ll provide you with a step-by-step guide on how to fix the B1404 error code.

Step 1: Check the Fuse

The first thing you should do when you encounter the B1404 error code is to check the fuse. The fuse is responsible for protecting the power window circuit from electrical surges and other issues. If the fuse is blown, it can cause the power window circuit to malfunction.

To check the fuse, locate the fuse box in your car. The fuse box is usually located under the dashboard or in the engine compartment. Once you’ve located the fuse box, find the fuse that corresponds to the power window circuit. The fuse box cover should have a diagram that shows which fuse corresponds to which circuit.

If the fuse is blown, replace it with a new one. Make sure to use the same amperage rating as the old fuse. Once you’ve replaced the fuse, test the power window to see if it’s working properly.

Step 2: Check the Wiring

If the fuse is not the issue, the next step is to check the wiring. The wiring is responsible for transmitting electrical signals between the power window switch and the power window motor. If there’s a problem with the wiring, it can cause the power window circuit to malfunction.

To check the wiring, you’ll need a multimeter. Set the multimeter to the continuity setting and test the wiring for continuity. If there’s a break in the wiring, it will show up as an open circuit on the multimeter.

If you find a break in the wiring, you’ll need to repair or replace the damaged section. This can be a difficult and time-consuming process, so it’s best to consult a professional if you’re not comfortable doing it yourself.

Step 3: Check the Power Window Motor

If the fuse and wiring are not the issue, the next step is to check the power window motor. The power window motor is responsible for moving the window up and down. If there’s a problem with the motor, it can cause the power window circuit to malfunction.

To check the power window motor, you’ll need to remove the door panel. Once you’ve removed the door panel, locate the power window motor. Disconnect the motor from the wiring harness and test it with a multimeter. If the motor is not functioning properly, you’ll need to replace it.

Conclusion

Fixing the B1404 error code can be a challenging task, but with the right tools and knowledge, it’s possible to do it yourself. By following the steps outlined in this article, you can diagnose and fix the issue with your power window circuit. If you’re not comfortable doing it yourself, it’s always best to consult a professional.

FAQs

1. Can I still use my power windows if I encounter the B1404 error code?

No, it’s not recommended to use your power windows if you encounter the B1404 error code. This can cause further damage to the power window circuit and make the problem worse.

2. How much does it cost to fix the B1404 error code?

The cost of fixing the B1404 error code can vary depending on the severity of the issue and the make and model of your car. It’s best to consult a professional for an accurate estimate.

3. How can I prevent the B1404 error code from happening again?

To prevent the B1404 error code from happening again, it’s important to maintain your car’s electrical system. This includes checking the fuses and wiring regularly and addressing any issues as soon as they arise.